Carbureter.



B. N. PIERCE.

CARBURETER.

APPLICATION FILED JAN. 24. 1907.

917,125. Patented Apr. 6, 190g.

Fig-1 IIHIUMIDI IN VEN 'ION .Burt Neulon lprc.

BURT NEULON PIERCE, OF INDIANAPOLIS, INDIANA.

CARBURE'TER.

i No. 917,125.

Specification of Letters Patent. I

Patented April 6, 1909.

Application led January 24, 1907. Serial No. 353,773.

To all whom it 'may concern:

Be it known that I, Buur NEULON Pinnen, oi' Indianapolis, county of Marion, and State of Indiana, have invented a certain new and useful Garbureter; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to i the accompanying drawings, in which like numerals refer to like parts.

The object of this invention is to provide an improved carburetor for combustion engines, one feature ot which consists in unit.- ing the outlet end with a shell of the carbureter so that the carbureter can be connected with a vertical or horizontal pipe er to pipes leading in two directions to the engine cylinder without modifying the position of the carbureter.

Another and a more important feature consists in roviding means in connection with an air inlet valve for opening the fuel inlet valve simultaneously and to a proportionate extent as the air inlet valve is opened in order to bring about a. proportionate admixture oi fuel andl air to form the ultimate gas in the engine. Also in connection with the foregoing, oi' a positively actin spring, which will always close the air inet valve and, consequently, the fuel inlet valve when not acted upon by the suction et he piston ot' the engine. And such. closing' action is perfectly free and independent et all other influences. One result of this arrangementis that this carbureter does not have to be maintained in any certain position. It. can be inverted and act with the same regularity as it' held upright. finother eii'ect of suoli construction is that the carbureter needs no tloat or float chamber filled with an accumulation of gasolene or other fuel to be maintained in a certain position. In connection with the foregoii'ig the throttle lever tends to regulate both the air inlet valve and the fuel inlet valve by limiting the opening et the air inlet valve only.

.inother important feature consists in proriding an emergency air inlet valve in addition to the regular air inlet valve, and heid closed by a stronger spring than the regular air inlet valve so that a suiiieient quantityy or" air will always be supplied to the carbureter to satisfy the suction of the pistons and prevent a vacuum in the cylinder of the engine. This emergency air inlet valve also ladmits air directly to the cylinder while the air is in a cool state and even after the regu lar air inlet valve has` been closed by the throttle. Another elfect is of a regulative character, for when the air enters through the en'iergency or secondary air inlet valve, the suction etl'ect of the piston upon the fuel inlet is thereby relatively diminished.

Another feature consists in the waste opening in the carburetor whereby the same may be kept clean, it being placed to one side of the artition so that it does not interfere with tie intake of the air and fuel in the shell of the carburetor and near a small opening through the lower part of the partition through which fluid in the shell may pass out through the waste opening.

In the drawings Figure 1 is a central verg tical section through the carbureter with the parts in their normal operating position, the

outlet end lthereof being arranged so as to connect with a vertical pipe. Fig. 2 is a section on the line 2-2 of Fig. 1. Fig. 3 is the same as Fie. 1 with both valves open and the outlet em turned and in position to be connected with a horizontal pipe. Fig. 4 is a sectionl on the line ll-4 of Fig. 1.

In detail the carbureter shell 10 has an integral air inlet end 11 adapted to be con .uected with a. ipe, and an adjustable outlet end 12. TlIie parts 10 and 12 are connected by bolts 13, and at their junction are both out diagonally on the line from the normal vertical or horizontal lines through the outlet portion of the body 10 and through the outlet end'12. This feature of the construction enables the outlet end of the carburetor to be connected with a vertical or horizontal pipe leading to the cylinder of the gas engine, or to adjust itl in at least two positions.

The fuel enters the shell of the carbureter through a removable casing 15, which is screwed into a sleeve 116 that extends downwardly from the shell of the earbureter. The outlet end of the casing 15 is closed by a valve 16 on the stem 17 that protrudes through the outlet opening. The valve is forced against its seat by a spring 18 coiled spirally about the stem thereof below the valve 16. This valve mechanism is held in place from escape by a lock-nut. 19. In the shell 10 there is a partition 20 which forms two chambers 21 and 22. The chamber 21 is on the air side of the partition, and the chamber 22 is on the fuel inlet side thereof, and the chamber 22 is the mixing chamber for the air and fuel. This partition has two the spring openings in it, the lower opening 23 being opposite to the air inlet end 11 and being closed by a disk valve 24 that is carried on a slightly conical tubular sleeve 25 that is mounted on a rod 26 which is threaded at both ends, the inner end screwing into an arm 27 that extends from the shell l0 o n the air side of the partition 20, and the other end extending through the packing 28 and having on it a lock-nut 29.

A sprncr 30 is wound spirally about the rod 26 and presses against the sleeve 25 at one end and the packing 28 at the other, so that it tends to keep the valve 24 closed. The tapering sleeve 25 is iii engagement with the upper end of the valve stem 17 so that when the valve 24 is opened and moved to the right, as appears in Fig. 1, the sleeve 29 will force down the stem 17 and at the samev time open the fuel inlet valve 16. The greater the opening movement of the valve 24, the greater will be the opening movement of the valve 16, so that there is co eration between these two valves contro ed by the valve 24. rll`he opening movement of the valve 24 is ultimately stopped or limited by a buffer 31 on a throttle arm 32 that is operated by a lever 33.

rEhe upper opening 40 in the partition 20 is substantially the same in shape and diameter as the lower opening 23, and is closed by a substantially similar disk valve 4l, which is slidably mounted on the valve stem or rod 42 that is threaded or screws into a bearing 43 on the shell l0 and is locked in place by a nut 44 and has a pin 45,. whereby the said rod 42 may be adjusted into position, The inner end of the 'valve rod 42 has on it a head 46, and there is a spring 47 mounted on said rod between the valve 41 and the head 46.

An important feature of the invention consists in thefact that the spring 47 which actuates and holds closed the upper valve seated. 'lhe effect of this variation in tension of the springs is to cause the lower valve to open normally instead of the upper valve, and the upper valve 41 will open only in emergencies, as will hereafter be ex lained. 4

here is an opening 50 in the lower part of the partition 20, as alp ears in Figs. 1 and.2 having considera 11d width, .as appears in the last figure. There is also a pair ofpassa eways 51 extending through the nut 52 t at is threaded in the casing 15, and 'in which the lower end of the valve stem 17 moves and against which the lower end'of the spring 18 acts. These holes 51 communicate `with 'the small chamber around the valve stem'and within the casing 15, and in this wa the fuelv is admitted to the. casing 15, an subsequently to the lows: The suction in the cylinder of the gas' engine opens the valve 24,'and its tapering sleeve 25 opens the valve 16, and then air and fuel are both drawn into the chamber 22 at the Asame moment, and thence passes from the outlet end to the'cylinder of the engine. The admission of fuel and air is regulated by the throttle lever 33, arm 32 and buffer 31, which limits the extent of the opening movement of the valve 24, and that through the tapering sleeve 25 correspondingly limits thelextent of the opening .movement of the valve 16 for the admission of fuel.

To prevent a vacuum occurring in the cylinder by reason of an insulcient quantity of air, the upper valve .41 is provided in this carbureter so as to admit an increased volv ume of air to the carbureter, but this does not occur, excepting when the suction is sufficiently reat to draw the lower valve 24 to its limit and also overcome the tension of the spring 47 that acts on the upper valve 41. Ordinarily this upper valve 41 would not operate, the lower valve 2 4 admitting a sufficient lvolume of air, and said lower valve would normally openbecause its spring is weaker than the spring that acts on the upper valve.

`What I claim as my invention and desire to secure by Letters Patent is:

1. A carbureter including a shell, a rod i adjustably mounted therein, an air inlet 41, is stronger and has greater tension than f 30 that holds the lower valve 24 valve slidably mounted on said rod, a tapering sleeve on saidrod and movable by saidv ico sleeve 'on said rod and movable by said air inlet valve, 'a spring lon said rod that tends to move. said air. inlet valve and sleeve to the closing position, ay spring-pressed' `fuel inlet valve -with the stein inengagement substantial] shaft exten ing into sai shell with a throttle arm, onthe inner end thereof, a buffer on with said taperingl sleevey and extending at va. rig v t angle lix-o'm said-rod, al

the end of said arm to engagey said inlet valve and limit its throw. and means outside of the carbureter for operating seid shaft.

3. A eorbureter including a pair of nir inlet valves, springs for seating said Valves, one valve nearer the outlet end of 'the shell and having :i stronger spring than the spring that :iets against the more remote niiinlet Valve, n fuel inlet vulve, und means moved directly ivy the air inlet vali-fe that is more remote from the outlet opening from the shell for opening said fuel inlet vulve whereby when the nii' inlet vulve nearer the outlet opening from the shell is open, the suction of the engine piston on the fuel inlet will be correspondingly diminished.

d. l cnrloureter including n Shell having :in nir inlet opening, nn outlet opening, a partition in seid shell between the inlet und outlet openings, seid partition lnving air inlet openings opposite the air inlet opening of the shell, an air inlet valve for closing euch air inlet opening in said partition one of said valves being nearer the outlet opening than the other vulve, n spring for holding euch of said nir inlet valves closed, the spring for the vulve nearer the outlet opening in the shell being stronger than the iepi-ing for the other Valve, n fuel inlet veli/e, menne adjacent and moved by said eir valve that is remote from the outlet oleening from the shell for directly opening seid fuel inlet valve. f

A carburetor including a shell, a partition dividing the air inlet side from the fuel inlet side of the interior of the Shell, seid partition having an opening at its lower ond, und ai waste outlet through the bottom ot' the shell on the air side of sind partition.

ln witness whereof, l have hereunto ntlixed my signature in the presence of the Witnesses herein named.

BUST NEULON PIERCE. ll'itnesses "N. LLnMoNG,

HELEN ll. .ll/lofdonn.` 

